I'm interested in the name "Querechos" and any occurrences in 16th-century documents from New Spain (i.e. Mexico). The name was used by members of the Coronado expedition to describe some Plains Indian groups (probably "proto-Apaches"), but I'd like to know if there were any tribal groups in New Spain that had been tagged as "Querechos" before 1540. I am familiar with all later occurrences of the name in and around New Mexico, and would like to track down its origin. .